Abstract A simple, economical, and rapid chemical method was developed for the precise measurement of major and trace elements in bulk pyrite and magnetite. This method, which required only 10–20 mg of sample, used inductively coupled plasma mass spectrometry (ICP-MS) and inductively coupled plasma optical emission spectrometry (ICP-OES) with a polyurethane foam (PUF)-based matrix removal step. Interference derived from the iron-rich mineral matrix was reduced by the removal of iron from the sample solution using 0.18 g PUF in 6 M HCl. The extraction conditions (e.g., temperature, shaking time, and initial iron concentration) were intensively investigated to achieve high iron separation efficiency. An iron removal rate of 92.7 ± 0.7% (n = 3, SD) and recoveries of 97–103% for 17 trace elements were obtained under the optimized separation conditions. To evaluate the feasibility of our method, reference materials for pyrite (GBW07267) and iron formation (FER-1 and FER-2) were analyzed. Our results were consistent with the certified values or literature values, and the precision was comparable to the certified uncertainty or that of previous methods in which 100 mg of sample powder was digested. These results confirmed that this novel method is an efficient technique for the precise measurement of multi-elements in pyrite and magnetite. Relative to other methods, our protocol has great potential for analyzing a wide variety of trace elements in small amounts (

中文翻译：

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通过 ICP-MS 和 ICP-OES 去除基质，精确测定黄铁矿和磁铁矿中多元素的简单方法

摘要 开发了一种简单、经济、快速的化学方法，用于精确测量块状黄铁矿和磁铁矿中的主量和微量元素。该方法仅需要 10–20 mg 样品，使用电感耦合等离子体质谱 (ICP-MS) 和电感耦合等离子体发射光谱 (ICP-OES) 以及基于聚氨酯泡沫 (PUF) 的基质去除步骤。通过使用 6 M HCl 中的 0.18 g PUF 从样品溶液中去除铁，减少了来自富含铁的矿物基质的干扰。对提取条件（例如温度、振荡时间和初始铁浓度）进行了深入研究，以实现高铁分离效率。在优化的分离条件下，17 种痕量元素的除铁率为 92.7 ± 0.7% (n = 3, SD)，回收率为 97-103%。为了评估我们方法的可行性，分析了黄铁矿 (GBW07267) 和铁形成 (FER-1 和 FER-2) 的参考材料。我们的结果与认证值或文献值一致，精度与认证不确定度或之前消解 100 mg 样品粉末的方法的不确定度相当。这些结果证实，这种新方法是一种精确测量黄铁矿和磁铁矿中多元素的有效技术。相对于其他方法，我们的协议具有分析少量多种微量元素的巨大潜力（精度与认证的不确定度或之前消解 100 mg 样品粉末的方法的精度相当。这些结果证实，这种新方法是一种精确测量黄铁矿和磁铁矿中多元素的有效技术。相对于其他方法，我们的协议具有分析少量多种微量元素的巨大潜力（精度与认证的不确定度或之前消解 100 mg 样品粉末的方法的精度相当。这些结果证实，这种新方法是一种精确测量黄铁矿和磁铁矿中多元素的有效技术。相对于其他方法，我们的协议具有分析少量多种微量元素的巨大潜力（